From binders and pockets to rigid top loaders, every option has advantages and risks
He wont even make all the elf decks, untapping lands is often more ramp, and removal or Overruns or card draw are things elves really want on walkers
Galerider Sliver takes the first slot on this list given its ability to give all your Slivers a huge advantage with their aerial superiority
(It's an artifact with " , , Sacrifice this token: You gain 3 life.") Whenever you create a token, put a +1/+1 counter on target creature you control other than Rosie Cotton
Once per turn, if a card(s) your opponent controls is banished by card effect (except during the Damage Step): You can make the next battle damage you take this turn become 0 (even if this card leaves the field)
Saviors of Kamigawa has 175 cards in total, shown in the spoilers list above